【插件开发三】开发继承IQHandler的插件

OF的插件开发有三种方式，关于如何开发OF的插件，请参考别的文章，本文就不具体描述了。下面讲述如何Register a plugin as anIQHandler。

我们如果要做自己的IQ包处理，可以自定义类如TestTemplateMethodHandler：class TestTemplateMethodHandler extends IQHandler。

以下需要注意：

1.IQ handlers相应包中特定的元素名或命名空间，在public IQHandlerInfo getInfo()方法中写上自己想要注册的元素名及命名空间，

2.在public IQ handlerIQ(IQ packet)方法中写上自己想要对丢进来的IQ包做什么样的处理（注意IQ包是基于问答形式的，所以应该有IQ包的reply）。

3.继承IQHandler的插件，需要注册到IQRouter中去。

以下是注册一个继承IQHandler的插件到IQRouter中的代码：

IQHandler myHandler = new MyIQHander();
IQRouter iqRouter = XMPPServer.getInstance().getIQRouter();
iqRouter.addHandler(myHandler);
           

接下来就是展示具体的实现继承IQHandler的插件两种方式：（区别主要是在把IQHandler的继承类和插件是否绑定在一起）

1.注册继承IQHandler的插件到IQrouter可以在这个插件初始化的时候：

package com.bis.plugins.iqhandler;

import java.io.File;

import org.jivesoftware.openfire.IQHandlerInfo;
import org.jivesoftware.openfire.IQRouter;
import org.jivesoftware.openfire.XMPPServer;
import org.jivesoftware.openfire.auth.UnauthorizedException;
import org.jivesoftware.openfire.container.Plugin;
import org.jivesoftware.openfire.container.PluginManager;
import org.jivesoftware.openfire.handler.IQHandler;
import org.xmpp.packet.IQ;

public class MyIQHandler extends IQHandler implements Plugin{

	private IQHandlerInfo info;

	public MyIQHandler() {
		super("MyIQHandler");
		info = new IQHandlerInfo("query", "jabber:iq:roster");
	}

	@Override
	public IQHandlerInfo getInfo() {
		// TODO Auto-generated method stub
		return info;
	}

	@Override
	public IQ handleIQ(IQ packet) throws UnauthorizedException {
		// TODO Auto-generated method stub
		IQ reply = IQ.createResultIQ(packet);
		System.out.println("【iq from】:" + reply.getFrom());
		System.out.println("【iq to】:" + reply.getTo());
		return reply;
	}

	@Override
	public void initializePlugin(PluginManager manager, File pluginDirectory) {
		IQRouter iqRouter = XMPPServer.getInstance().getIQRouter(); 
		iqRouter.addHandler(this); 
		System.out.println("==init myIQHandler==");
		
	}

	@Override
	public void destroyPlugin() {
		// TODO Auto-generated method stub
		
	}
}
           

或者，单独写一个IQHandler的实现类，再单独写一个插件专门用于把所有扩展的IQHandler继承类注册到IQRouter中：

IQHandler的继承类：

public class GroupTreeIQHander extends IQHandler
{

    private static final String MODULE_NAME = "group tree handler";

    private static final String NAME_SPACE = "com:im:group";

    private IQHandlerInfo info;

    public GroupTreeIQHander()
    {
        super(MODULE_NAME);
        info = new IQHandlerInfo("gruops", NAME_SPACE);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.jivesoftware.openfire.handler.IQHandler#getInfo()
     */
    @Override
    public IQHandlerInfo getInfo()
    {
        return info;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.jivesoftware.openfire.handler.IQHandler#handleIQ(org.xmpp.packet.IQ)
     */
    @Override
    public IQ handleIQ(IQ packet) throws UnauthorizedException
    {
        IQ reply = IQ.createResultIQ(packet);
        Element groups = packet.getChildElement();//1
        
        if (!IQ.Type.get.equals(packet.getType()))
        {
            System.out.println("非法的请求类型");
            reply.setChildElement(groups.createCopy());
            reply.setError(PacketError.Condition.bad_request);
            return reply;
        }
        
        String userName = StringUtils.substringBefore(packet.getFrom().toString(),"@");

        GroupManager.getInstance().initElement(groups,userName);
        
        reply.setChildElement(groups.createCopy());//2

        System.out.println("返回的最终XML" + reply.toXML());

        return reply;
    }

}
           

再写一个插件，用于把扩展的IQHandler继承类注册到IQRouter中：

/**
 * 服务器端插件类
 * 
 * @author Phoenix
 * 
 * Mar 14, 2008 11:03:11 AM
 * 
 * version 0.1
 */
public class GroupTreePlugin implements Plugin
{
    private XMPPServer server;

    /*
     * (non-Javadoc)
     * 
     * @see org.jivesoftware.openfire.container.Plugin#destroyPlugin()
     */
    public void destroyPlugin()
    {

    }

    /*
     * (non-Javadoc)
     * 
     * @see org.jivesoftware.openfire.container.Plugin#initializePlugin(org.jivesoftware.openfire.container.PluginManager,
     *      java.io.File)
     */
    public void initializePlugin(PluginManager manager, File pluginDirectory)
    {
        PluginLog.trace("注册群组树IQ处理器");
        server = XMPPServer.getInstance();
        
        server.getIQRouter().addHandler(new GroupTreeIQHander()); //1
        server.getIQRouter().addHandler(new UserInfoIQHandler());
        server.getIQRouter().addHandler(new DelUserIQHandler());
        server.getIQRouter().addHandler(new CreateUserIQHandler());
        server.getIQRouter().addHandler(new AddGroupUserIQHandler());
        server.getIQRouter().addHandler(new SetRoleIQHandler());

    }

}